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start_server {tags {"obuf-limits"}} {
test {Client output buffer hard limit is enforced} {
r config set client-output-buffer-limit {pubsub 100000 0 0}
set rd1 [redis_deferring_client]
$rd1 subscribe foo
set reply [$rd1 read]
assert {$reply eq "subscribe foo 1"}
set omem 0
while 1 {
r publish foo bar
set clients [split [r client list] "\r\n"]
set c [split [lindex $clients 1] " "]
if {![regexp {omem=([0-9]+)} $c - omem]} break
if {$omem > 200000} break
}
assert {$omem >= 70000 && $omem < 200000}
$rd1 close
}
test {Client output buffer soft limit is not enforced if time is not overreached} {
r config set client-output-buffer-limit {pubsub 0 100000 10}
set rd1 [redis_deferring_client]
$rd1 subscribe foo
set reply [$rd1 read]
assert {$reply eq "subscribe foo 1"}
set omem 0
set start_time 0
set time_elapsed 0
while 1 {
r publish foo bar
set clients [split [r client list] "\r\n"]
set c [split [lindex $clients 1] " "]
if {![regexp {omem=([0-9]+)} $c - omem]} break
if {$omem > 100000} {
if {$start_time == 0} {set start_time [clock seconds]}
set time_elapsed [expr {[clock seconds]-$start_time}]
if {$time_elapsed >= 5} break
}
}
assert {$omem >= 100000 && $time_elapsed >= 5 && $time_elapsed <= 10}
$rd1 close
}
test {Client output buffer soft limit is enforced if time is overreached} {
r config set client-output-buffer-limit {pubsub 0 100000 3}
set rd1 [redis_deferring_client]
$rd1 subscribe foo
set reply [$rd1 read]
assert {$reply eq "subscribe foo 1"}
set omem 0
set start_time 0
set time_elapsed 0
while 1 {
r publish foo bar
set clients [split [r client list] "\r\n"]
set c [split [lindex $clients 1] " "]
if {![regexp {omem=([0-9]+)} $c - omem]} break
if {$omem > 100000} {
if {$start_time == 0} {set start_time [clock seconds]}
set time_elapsed [expr {[clock seconds]-$start_time}]
if {$time_elapsed >= 10} break
}
}
assert {$omem >= 100000 && $time_elapsed < 6}
$rd1 close
}
test {No response for single command if client output buffer hard limit is enforced} {
r config set client-output-buffer-limit {normal 100000 0 0}
# Total size of all items must be more than 100k
set item [string repeat "x" 1000]
for {set i 0} {$i < 150} {incr i} {
r lpush mylist $item
}
set orig_mem [s used_memory]
# Set client name and get all items
set rd [redis_deferring_client]
$rd client setname mybiglist
assert {[$rd read] eq "OK"}
$rd lrange mylist 0 -1
$rd flush
after 100
# Before we read reply, redis will close this client.
set clients [r client list]
assert_no_match "*name=mybiglist*" $clients
set cur_mem [s used_memory]
# 10k just is a deviation threshold
assert {$cur_mem < 10000 + $orig_mem}
# Read nothing
set fd [$rd channel]
assert_equal {} [read $fd]
}
# Note: This test assumes that what's written with one write, will be read by redis in one read.
# this assumption is wrong, but seem to work empirically (for now)
test {No response for multi commands in pipeline if client output buffer limit is enforced} {
r config set client-output-buffer-limit {normal 100000 0 0}
set value [string repeat "x" 10000]
r set bigkey $value
set rd1 [redis_deferring_client]
set rd2 [redis_deferring_client]
$rd2 client setname multicommands
assert_equal "OK" [$rd2 read]
# Let redis sleep 1s firstly
$rd1 debug sleep 1
$rd1 flush
after 100
# Create a pipeline of commands that will be processed in one socket read.
# It is important to use one write, in TLS mode independant writes seem
# to wait for response from the server.
# Total size should be less than OS socket buffer, redis can
# execute all commands in this pipeline when it wakes up.
set buf ""
for {set i 0} {$i < 15} {incr i} {
append buf "set $i $i\r\n"
append buf "get $i\r\n"
append buf "del $i\r\n"
# One bigkey is 10k, total response size must be more than 100k
append buf "get bigkey\r\n"
}
$rd2 write $buf
$rd2 flush
after 100
# Reds must wake up if it can send reply
assert_equal "PONG" [r ping]
set clients [r client list]
assert_no_match "*name=multicommands*" $clients
set fd [$rd2 channel]
assert_equal {} [read $fd]
}
test {Execute transactions completely even if client output buffer limit is enforced} {
r config set client-output-buffer-limit {normal 100000 0 0}
# Total size of all items must be more than 100k
set item [string repeat "x" 1000]
for {set i 0} {$i < 150} {incr i} {
r lpush mylist2 $item
}
# Output buffer limit is enforced during executing transaction
r client setname transactionclient
r set k1 v1
r multi
r set k2 v2
r get k2
r lrange mylist2 0 -1
r set k3 v3
r del k1
catch {[r exec]} e
assert_match "*I/O error*" $e
reconnect
set clients [r client list]
assert_no_match "*name=transactionclient*" $clients
# Transactions should be executed completely
assert_equal {} [r get k1]
assert_equal "v2" [r get k2]
assert_equal "v3" [r get k3]
}
test "Obuf limit, SRANDMEMBER with huge count stopped mid-run" {
r config set client-output-buffer-limit {normal 1000000 0 0}
r sadd myset a
catch {r srandmember myset -999999999} e
assert_match "*I/O error*" $e
reconnect
}
}
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